Unsubstituted
未被取代的
??? 情景例句
Could you explain why you left?
你能解釋一下你離開(kāi)的原因嗎？
I played upstairs yesterday.
我昨天在樓上玩。
Everybody says I must be mad and they are probably right.
大家都說(shuō)我肯定是瘋了，也許他們說(shuō)的是對(duì)的。